This endorsement is required if the driver will pull two or three trailers. To receive this endorsement, applicants must pass a test. The test consists of 20 multiple choice questions. To pass, the applicant must answer at least 16 questions correctly. Each question has three possible answer choices. Test questions come from the Kentucky Commercial Driver License Manual. Questions come from chapters covering: Driving Safely, Air Brakes (if applicable), Combination Vehicles and Doubles and Triples. The Double/Triple endorsement can be used with the Class A CDL.
Number of Question
1. Antifreeze helps to keep an engine functioning properly:
It is always important to have enough water and antifreeze in a vehicle's cooling system. Despite the name, antifreeze is beneficial to an engine even in hot weather.
2. After starting the engine, the Anti-Lock Braking System (ABS) light stays on if:
The Anti-Lock Braking System (ABS) indicator light should come on after an engine is started. The light will then turn off. If the light remains on, the ABS it not working properly.
3. Once cargo is secured onto a vehicle:
The securement of cargo must be checked before beginning a trip, within the first 50 miles of a trip, and then again every three hours or 150 miles thereafter.
4. What happens when a vehicle hydroplanes?
On a wet road, it is possible for a vehicle's tires to lose traction with the road surface and begin to glide along on the layer of water. This is referred to as hydroplaning. Hydroplaning can occur at speeds as low as 30 mph.
5. To check the automatic transmission fluid level in some vehicles, you will have to:
In some vehicles, it may be necessary to leave the engine running when checking the automatic transmission fluid level.
6. If making a tight turn, the operator of a CMV should:
Drivers behind you may not anticipate how slowly your CMV must travel to safely make a right turn. You can help warn them in advance by braking early and slowing gradually.
7. Roads are especially slippery when it first begins to rain because: